11520155100 has 72 divisors (see below), whose sum is σ = 33348837760. Its totient is φ = 3070457280.

The previous prime is 11520155057. The next prime is 11520155159. The reversal of 11520155100 is 155102511.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 644889 + ... + 662511.

Almost surely, 2^11520155100 is an apocalyptic number.

11520155100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11520155100 is an abundant number, since it is smaller than the sum of its proper divisors (21828682660).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11520155100 is a wasteful number, since it uses less digits than its factorization.

11520155100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19819 (or 19812 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 21.

Adding to 11520155100 its reverse (155102511), we get a palindrome (11675257611).

The spelling of 11520155100 in words is "eleven billion, five hundred twenty million, one hundred fifty-five thousand, one hundred".